Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of estimated useful lives

Properties are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows:

Category	Term
Building (fee ownership)	40 years
Building improvements	shorter of remaining life of the building or useful life
Building (leasehold interest)	lesser of 40 years or remaining term of the lease
Property under capital lease	remaining lease term
Furniture and fixtures	four to seven years
Tenant improvements	shorter of remaining term of the lease or useful life

Summary of identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases)

The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of December 31, 2016 and 2015 (in thousands):

	December 31,
	2016			2015
Identified intangible assets (included in other assets):
Gross amount	$	651,099		$	939,518
Accumulated amortization	(410,930		)	(403,747		)
Net(1)	$	240,169		$	535,771
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	655,930		$	866,561
Accumulated amortization	(464,749		)	(486,928		)
Net(1)	$	191,181		$	379,633

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(1) As of December 31, 2016, no net intangible assets and no net intangible liabilities were reclassified to assets held for sale and liabilities related to assets held for sale.

Schedule of estimated annual amortization of acquired above-market leases, net of acquired below-market leases

The estimated annual amortization of acquired above-market leases, net of acquired (below-market) leases (a component of rental revenue), for each of the five succeeding years is as follows (in thousands):

2017	$	(19,286	)
2018	(17,022		)
2019	(16,300		)
2020	(15,279		)
2021	(6,356		)

Schedule of estimated annual amortization of all other identifiable assets

The estimated annual amortization of all other identifiable assets (a component of depreciation and amortization expense) including tenant improvements for each of the five succeeding years is as follows (in thousands):

2017	$	24,801
2018	17,600
2019	14,780
2020	12,742
2021	8,986

Schedule of marketable securities

At December 31, 2016 and 2015, we held the following marketable securities (in thousands):

	December 31,
	2016		2015
Equity marketable securities	$	48,315	$	4,704
Mortgage-backed securities	36,795		40,434
Total marketable securities available-for-sale	$	85,110	$	45,138

Schedule of Restated Balance Sheets

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Schedule of Error Corrections and Prior Period Adjustments

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